Hey moxie1884, yes u can make your own i think you can buy blank shafts at bass pro or one of the big outfitters ,just make sure that there all same weight and size .you can cut them with dremel tool or high speed cutter.
then fletch with some quick fletch they slide on then u dip them in boiling water to make them stick to the shaft. If you do alot of shooting this is the only way to go.
I have always thought that i could do a little of what others could do alot of.
good luck and i hope this helps
take your kids hunting and you wont have to hunt your kids.